CN104160186A - Piston pin - Google Patents

Piston pin Download PDF

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Publication number
CN104160186A
CN104160186A CN201380012610.7A CN201380012610A CN104160186A CN 104160186 A CN104160186 A CN 104160186A CN 201380012610 A CN201380012610 A CN 201380012610A CN 104160186 A CN104160186 A CN 104160186A
Authority
CN
China
Prior art keywords
wrist pin
piston
connecting rod
endoporus
bias
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201380012610.7A
Other languages
Chinese (zh)
Other versions
CN104160186B (en
Inventor
曼弗雷德·海因
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of CN104160186A publication Critical patent/CN104160186A/en
Application granted granted Critical
Publication of CN104160186B publication Critical patent/CN104160186B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/10—Connection to driving members
    • F16J1/14—Connection to driving members with connecting-rods, i.e. pivotal connections
    • F16J1/16—Connection to driving members with connecting-rods, i.e. pivotal connections with gudgeon-pin; Gudgeon-pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0448—Steel

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The present invention relates to a piston pin (1) for connecting a small connecting rod eye of a connecting rod to a piston of an internal combustion engine, wherein the piston pin (1) has an inner bore (2) having an eccentricity (3, h) relative to the casing surface (4) of the piston pin (1). It is essential to the invention that the eccentricity (3, h) is no more than 0.5 mm and spiral-shaped lubricating grooves (5) are arranged on the casing surface (4) of the piston pin (1). In this manner, a piston pin (1) that is not negatively influenced with respect to its rigidity and has high wear resistance can be obtained.

Description

Wrist pin
Technical field
According to the preamble of claim 1, the present invention relates to a kind of wrist pin, this wrist pin is for being connected to the aperture of connecting rod in the piston of internal-combustion engine.The invention still further relates to a kind of internal-combustion engine with at least one piston, described piston is connected to connecting rod by wrist pin.
Background technique
DE102009032938A1 discloses a kind of pot type piston pin, and this wrist pin is for being connected to the connector bar hole of folder type connecting rod in the piston of internal-combustion engine.Wherein, piston has a hub bore that holds wrist pin, and described wrist pin has an endoporus.Here the endoporus providing has the bias with respect to wrist pin outer surface, and this allows endoporus to have larger space, and saves material thus, especially weight reduction.
US2849265 discloses another common wrist pin.
US3053595B discloses a kind of wrist pin with eccentric inner hole.Connecting rod is fixedly connected with by two screws each other rotationally with wrist pin.
Conventionally, wrist pin is connected connecting rod with the piston of internal-combustion engine, and connecting rod connects piston and bent axle.Aperture towards the connecting rod of piston arranges along hub bore, and its introducing is arranged on sells hub on piston.Pin hub and connecting rod hole are arranged on piston, bear maximum load.Because, wrist pin not only in piston swing process owing to acting on huge power on piston and bending, but also can on center hole and connecting rod aperture, rub.
Summary of the invention
The problem that the present invention pays close attention to is the mode of execution improved or that at least replace of a kind of pot type piston pin of explanation, and its wear resistance strengthens.
According to the present invention, this problem is solved by the protection theme of independent claims.Favourable mode of execution forms the theme of dependent claims.
The present invention is based on so a kind of basic conception, an endoporus that runs through wrist pin is set vertically on known wrist pin, in the case, wrist pin itself is for connecting the piston of internal-combustion engine and the aperture of connecting rod, endoporus has the bias with respect to outer surface of piston, and eccentricity value of the present invention is 0.5mm to the maximum, and millimeter is a few tenths of, therefore, can not have a negative impact to the mechanical force of piston.The bias of a few tenths of millimeter has enough made piston rotate under high-revolving inertial force effect.In addition, spiral lubrication groove is arranged on the outer surface of wrist pin, and it rotates under the inertial force effect of wrist pin, produces and lubricates equally at the aperture place of hub bore or connecting rod, has strengthened thus wear resistance.The degree of depth of lubrication groove is a few percent millimeter, and the so little degree of depth has enough made wrist pin have enough lubricating at the aperture place of the hub bore connecting rod of piston.Piston when acceleration or deceleration, produces one and causes the power of rotation under the stroke movement effect at piston during internal combustion engine operation, and then impels wrist pin to rotate.By rotating, can bring beneficial effect, the wearing and tearing on wrist pin are evenly distributed on the boundary of wrist pin, have strengthened thus the wear resistance of wrist pin.
In reality, be coated with the preferred friction coatings of one deck baking vanish or noncrystalline piston material at piston face, preferably rhombus carbon.For simplify wrist pin in connecting rod especially in connecting rod hole and/or the motion of piston hub bore, or in order to reduce friction, the present invention is provided with friction coat.Rhombus carbon coating is non-crystalline carbon, has increased wear resistance, has friction reducing effect.
Other key characters of the present invention and advantage applies are in additional claim, accompanying drawing and corresponding brief description of the drawings.
Should be understood that above-mentioned feature that mention and that will explain not only can be used in the combination of description below, also can be used for other combinations or use separately, do not depart from the scope of the present invention.
Brief description of the drawings
The preferred embodiments of the present invention illustrate in the accompanying drawings, and explain in more detail in the following description.Wherein, identical reference character represents parts identical, similar or that function is identical.
Below respectively shown in the drawings of:
Fig. 1 is the eccentric schematic diagram of wrist pin of the present invention;
Fig. 2 is wrist pin axial section of the present invention;
Fig. 3 is wrist pin side view of the present invention.
Embodiment
With reference to Fig. 1-3, wrist pin 1 of the present invention is for linking together the connector bar hole of connecting rod (not shown) with the piston of internal-combustion engine (same not shown), wrist pin 1 has an endoporus 2, and endoporus 2 has the bias 3 with respect to the outer surface 4 of wrist pin 1.Eccentric 3 value of the present invention is 0.5mm to the maximum, and millimeter is a few tenths of.The bias of a few tenths of millimeter has enough made wrist pin 1 in the stroke movement process of piston, accelerate and slow down.Therefore,, on the basis of center of gravity G1 bias, produce a power F who causes the lever h that rotates M, and then impel wrist pin 1 to rotate.The bias 3 that is equivalent to lever h has been guaranteed center of gravity transformation to G1 by G.As mentioned above, endoporus 2 is to be formed by punching tool, and is generally cylindrical.Or the conical design of endoporus 2 also can be expected.Eccentric 3 can produce or form by cold hot extrusion with lathe tool.With reference to Fig. 2, obviously can find out, eccentric 3 extend throughs the middle part b of wrist pin 1.Also whole axial length or the lateral arrangement that can expect eccentric 3 extend through wrist pins 1, be arranged in longitudinal end.As second key character, spirality lubrication groove 5 (shown in Fig. 3) is arranged on the outer surface 4 of wrist pin 1, and it has the degree of depth of a few percent millimeter.Even if the so little degree of depth also can be transmitted lubricant oil, thus, reduce the surface friction drag of wrist pin 1 in the hub bore of piston or in connecting rod aperture.
In order further to reduce friction, can on the outer surface of wrist pin 14, be coated with one deck baking vanish, preferably friction coatings or noncrystalline piston material, preferably rhombus carbon (DLC).Described coating can reduce frictional influence and strengthen wear resistance simultaneously.
In order to simplify the motion of wrist pin especially aerial at connecting rod and/or piston center hole in connecting rod, or in order to reduce friction, the present invention is provided with friction coat.Rhombus carbon coating is non-crystalline carbon, has increased wear resistance, has friction reducing effect.
By the conversion of center of gravity G1 and the rotation M that causes thus, wrist pin 1 continues to rotate during internal combustion engine operation, and therefore, the wearing and tearing are here evenly distributed on the boundary of wrist pin 1.Thus, can avoid monolateral or friction especially.
Wrist pin 1 has the diameter of 2-4cm conventionally, and this depends on corresponding piston size.As previously mentioned, eccentric 3 can be arranged on middle part, and being positioned at a side or section is stepped shaft, and wherein, the inside groove 6 that forms bias 3 can form by punching or turning.The inside groove 6 of wrist pin 1 forms by cold hobbing or hot extrusion.Wherein, axle is pressed into solid pin material from the both sides of wrist pin 1.Conventionally, endoporus 2 can form by this method, i.e. so-called pore-forming.
The advantage that small bias 3 and the less degree of depth of groove 6 have has been to retain the mechanical strength of piston 1.Only have the bias 3 of a few tenths of millimeter enough to produce inertial force F, particularly, in the time of internal-combustion engine high speed rotating, this is enough for the rotation of wrist pin 1.

Claims (8)

1. a wrist pin (1), for the connector bar hole of connecting rod and the piston of internal-combustion engine are linked together, wherein, described wrist pin (1) has an endoporus (2), described endoporus (2) has the bias (3 of an outer surface with respect to described wrist pin (1) (4), h), it is characterized in that:
-eccentric (3, value h) is 0.5mm to the maximum,
-spirality lubrication groove (5) is arranged on the outer surface (4) of described wrist pin (1).
2. wrist pin according to claim 1 (1), is characterized in that, (3, value h) is 0.2mm to the maximum to described bias.
3. wrist pin according to claim 1 and 2, is characterized in that, described bias (3, h) or groove (6) formed by cold hobbing or hot extrusion equally.
4. according to the wrist pin described in claim 1-3 any one, it is characterized in that, described endoporus (2) is formed as cylindrical or taper.
5. according to the wrist pin described in claim 1-4 any one, it is characterized in that, and described bias (3, the h) middle part (b) of endoporus (2) described in extend through.
6. according to the wrist pin described in claim 1-5 any one, it is characterized in that, described lubrication groove (5) has the degree of depth of a few percent millimeter.
7. according to the wrist pin described in claim 1-6 any one, it is characterized in that the upper one deck baking vanish that is coated with of outer surface (4) of described wrist pin (1), preferably friction coatings or noncrystalline piston material, preferably rhombus carbon (DLC).
8. have an internal-combustion engine at least one piston, described piston is connected to connecting rod by the wrist pin (1) described in claim 1-7 any one.
CN201380012610.7A 2012-03-09 2013-03-06 Piston pin Expired - Fee Related CN104160186B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012203744.6 2012-03-09
DE102012203744A DE102012203744A1 (en) 2012-03-09 2012-03-09 piston pin
PCT/EP2013/054471 WO2013131939A1 (en) 2012-03-09 2013-03-06 Piston pin

Publications (2)

Publication Number Publication Date
CN104160186A true CN104160186A (en) 2014-11-19
CN104160186B CN104160186B (en) 2017-04-26

Family

ID=48045418

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201380012610.7A Expired - Fee Related CN104160186B (en) 2012-03-09 2013-03-06 Piston pin

Country Status (4)

Country Link
US (1) US9404577B2 (en)
CN (1) CN104160186B (en)
DE (1) DE102012203744A1 (en)
WO (1) WO2013131939A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106958655A (en) * 2015-12-11 2017-07-18 现代自动车株式会社 Piston pin and the method for manufacturing piston pin
CN108547706A (en) * 2018-03-28 2018-09-18 安徽宝泰汽车部件有限公司 A kind of engine gudgeon pin
CN108730513A (en) * 2018-04-09 2018-11-02 江苏大学 A kind of piston pin and preparation method thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012022913A1 (en) * 2012-11-23 2014-05-28 Mahle International Gmbh Piston for an internal combustion engine
FR3063122A1 (en) 2017-02-21 2018-08-24 Peugeot Citroen Automobiles Sa MOTION TRANSMISSION DEVICE FOR THERMAL MOTOR
US20190301606A1 (en) * 2018-03-30 2019-10-03 Federal-Mogul Llc Lubrication feature for pin of two stroke piston assembly
KR20220114262A (en) * 2021-02-08 2022-08-17 현대자동차주식회사 Piston pin and method for manufacturing the same

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702092A (en) * 1971-05-03 1972-11-07 Zollner Corp Pistons for engines
US4297975A (en) * 1978-06-13 1981-11-03 Mondial Piston - Dott. Galli Ercole & C. S.P.A. Device for improving the lubrication in a rotary coupling
EP1389700A2 (en) * 2002-08-14 2004-02-18 Volkswagen Aktiengesellschaft Bearing arrangement and method of fabrication thereof
CN1573064A (en) * 2003-06-06 2005-02-02 日产自动车株式会社 Engine piston-pin sliding structure
CN201661678U (en) * 2010-03-25 2010-12-01 株洲湘火炬机械制造有限责任公司 Novel piston pin
DE102009032938A1 (en) * 2009-07-14 2011-01-20 Mahle International Gmbh Piston pin for connecting small connecting rod eye of clamping piston rod with piston of combustion engine, has inner hole, where piston is equipped with hub bore hole for receiving piston pin
CN201802856U (en) * 2010-10-05 2011-04-20 江铃汽车股份有限公司 Constant-strength piston pin

Family Cites Families (12)

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US2625448A (en) * 1949-04-22 1953-01-13 Gen Motors Corp Bearing lubrication
US2849265A (en) * 1954-08-02 1958-08-26 Gen Motors Corp Floating piston pin
US3053595A (en) 1961-09-01 1962-09-11 Gen Motors Corp Variable curvature wrist pin bearing
US3808955A (en) * 1972-10-12 1974-05-07 Yanmar Diesel Engine Co Cylinders of internal-combustion engines
DE4210056A1 (en) 1992-03-27 1993-09-30 Mahle Gmbh Reciprocating piston of an internal combustion engine
JPH06101759A (en) * 1992-09-17 1994-04-12 Toyota Motor Corp Piston pin lubricating structure for two-cycle engine
JPH07317899A (en) * 1994-05-25 1995-12-08 Daihatsu Motor Co Ltd Piston pin for internal combustion engine and machining method therefor
US5762843A (en) * 1994-12-23 1998-06-09 Kennametal Inc. Method of making composite cermet articles
JP2666181B2 (en) 1995-06-12 1997-10-22 ヤマハ発動機株式会社 2 cycle engine
DE19704224A1 (en) * 1996-02-19 1997-08-21 Volkswagen Ag Connection between lifting piston and connecting rod in vehicle engines
DE102005055365A1 (en) 2004-12-10 2006-06-22 Mahle International Gmbh Piston for an internal combustion engine and method for coating its hub bores
US8281764B2 (en) * 2009-06-25 2012-10-09 Onur Gurler Half cycle eccentric crank-shafted engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702092A (en) * 1971-05-03 1972-11-07 Zollner Corp Pistons for engines
US4297975A (en) * 1978-06-13 1981-11-03 Mondial Piston - Dott. Galli Ercole & C. S.P.A. Device for improving the lubrication in a rotary coupling
EP1389700A2 (en) * 2002-08-14 2004-02-18 Volkswagen Aktiengesellschaft Bearing arrangement and method of fabrication thereof
CN1573064A (en) * 2003-06-06 2005-02-02 日产自动车株式会社 Engine piston-pin sliding structure
DE102009032938A1 (en) * 2009-07-14 2011-01-20 Mahle International Gmbh Piston pin for connecting small connecting rod eye of clamping piston rod with piston of combustion engine, has inner hole, where piston is equipped with hub bore hole for receiving piston pin
CN201661678U (en) * 2010-03-25 2010-12-01 株洲湘火炬机械制造有限责任公司 Novel piston pin
CN201802856U (en) * 2010-10-05 2011-04-20 江铃汽车股份有限公司 Constant-strength piston pin

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106958655A (en) * 2015-12-11 2017-07-18 现代自动车株式会社 Piston pin and the method for manufacturing piston pin
CN108547706A (en) * 2018-03-28 2018-09-18 安徽宝泰汽车部件有限公司 A kind of engine gudgeon pin
CN108730513A (en) * 2018-04-09 2018-11-02 江苏大学 A kind of piston pin and preparation method thereof

Also Published As

Publication number Publication date
US20150136063A1 (en) 2015-05-21
DE102012203744A1 (en) 2013-09-12
CN104160186B (en) 2017-04-26
US9404577B2 (en) 2016-08-02
WO2013131939A1 (en) 2013-09-12

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Granted publication date: 20170426

Termination date: 20190306